WOWindow posters are full color, plastic film Halloween window decorations that "light up" at night for the enjoyment of family, neighbors, and trick-or-treaters. The secret WOW optics formula produces a dramatic special effect from backlighting with everyday household lamps. Low wattage bulbs work well and you can add strobe lights for an additional effect! Put these up, sit back and enjoy watching the neighbors do double takes! Easy to set up. This Halloween decoration features a en evil green demon that's sure to bring shivers!